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15 Jun 1975

Volume 26, Issue 12, pp. 659-724

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Ballistic overshoot in the gradient propagation of bubbles in garnet films

A. P. Malozemoff and J. C. DeLuca

Appl. Phys. Lett. 26, 719 (1975); http://dx.doi.org/10.1063/1.88049 (3 pages) | Cited 22 times

Online Publication Date: 2 September 2008

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We report the first observation of a large ballistic effect in the gradient propagation of magnetic bubble domains in high‐mobility garnet films. Using high‐speed laser photography to measure bubble position as a direct function of time, we observe a large displacement after the gradient pulse has turned off, with a relaxation time of several microseconds.
Show PACS
75.60.Ch Domain walls and domain structure

Influence of gyromagnetic ratio on magnetic domain wall dynamics

G. P. Vella‐Coleiro, S. L. Blank, and R. C. LeCraw

Appl. Phys. Lett. 26, 722 (1975); http://dx.doi.org/10.1063/1.88050 (3 pages) | Cited 5 times

Online Publication Date: 2 September 2008

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We have investigated the dynamics of magnetic domain walls in three epitaxial garnet films with g values of 1.07, 4.8, and ≳30, and having wall mobilities of 880, 930, and 820 cm/sec Oe, respectively. Bubble collapse measurements in the films with g=1.07 and 4.8 showed velocity saturation with the approximate values 1500 and 8000 cm/sec, respectively. The film with g≳30 showed no saturation, and velocities up to 6×104 cm/sec were observed. These results are consistent with the expected increase in the Slonczewski and Walker critical velocities with increasing g value. Large g values make it possible to operate magnetic bubble circuits at higher frequencies than is otherwise the case.
Show PACS
75.60.Ch Domain walls and domain structure
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